CHAPTER VIII

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The Carboniferous System—_continued_.—Geographical Distribution of Coal.—The Great Coal-Field of Pennsylvania, Virginia, and Ohio.—Coal Deposits of Kentucky, Indiana, Illinois, and Michigan.—Economic History of Coal.—Conditions of Formation, 115

## CHAPTER IX .

The Geological Structure of Fifeshire, 132

## CHAPTER X .

Geology of Edinburgh and its Environs.—Mid-Lothian Coal-Basin.—The Pentlands, 138

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